Abstract
We show that rocking filters can be fabricated in photosensitive elliptical-core fibers with 193-nm radiationfrom an excimer laser by the external point-by-point fabrication technique. We find that the writing efficiency at this wavelength is significantly larger than that at 240 nm. Furthermore, the growth dynamics of rocking filters fabricated with these two wavelengths are dissimilar, which may suggest different photosensitive mechanisms.
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